iW600

Secondary-Side Voltage Positioning Controller

1 of 6

Rev. 1.0

© 2016 Dialog Semiconductor

10-November-2016

Product Summary

www.dialog-semiconductor.com

RTN

+

+

+

U1

iW1600

GND

GND

1

2

8

7

6

4

5

L

N

OUTPUT

CS/CDC

HV

1

2

D1

iW600

Figure 3.1: iW600 Typical Application Circuit (Using iW1600 as Primary-Side Controller) (Achieving < 10mW

No-load Power Consumption in 5V/2A 10W Adapter with Fast Dynamic Load Response)

1 Description

The iW600 is a secondary-side voltage position controller to detect the voltage undershoot. It can be used in Dialog’s

primary-side control systems to achieve ultra-low no-load power consumption and fast dynamic load response. The iW600

operates in “Normally-OFF” mode with negligible power consumption during power supply normal steady state operation,

while monitoring dynamic load change through the voltage on the secondary rectifier. A wake-up signal is transferred

through the flyback power transformer to the primary side when a dynamic load change is detected. The iW600 eliminates

loop compensation components and the optocoupler on the secondary side to minimize the bill of material cost.

2 Features

● Fast system output voltage detection

● Transmits detection signal to the primary side through

flyback transformer

● Two-electrical-terminal connection simplifies system

PCB layout

3 Applications

● AC/DC adapters/chargers

● No external components

● Enables <10mW no-load power consumption in typical

5V-output systems

● Available in 3-lead SOT-23 and 2-lead DFN packages